Tomorrow is Christmas Jumper Day 2017 - because yes, Christmas Jumpers have their own special day.

Unsurprisingly, they are a big hit on social media and hopefully everyone will be wearing one tomorrow.

No one really knows exactly when the Christmas jumper became so cool, but it did. It just wouldn't be Christmas without a festive jumper emblazoned with Santa, Rudolph or a funny slogan.

Just about every high street store has rails of novelty sweaters and you better have yours ready, because Christmas Jumper Day 2017 is just around the corner.

Christmas Jumper Day 2017 is coming (Image: PA)

What is Christmas Jumper Day?

On a specific Friday in December every year, people are encouraged to make the world better with a sweater and raise funds for Save the Children by wearing a Christmas jumper and making a minimum donation of £1.

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It seems like people like nothing more than getting their festive tops on, heading to the office and taking photos with colleagues they were drinking / fearing / being hungover with just days before.

And Mark Wahlberg and Will Ferrell are taking part too.

If you want to join the initiative, but don't want to don a garment covered in tinsel, or emblazoned with a slogan like: 'Merry Christmas Ya Filthy Animal', check our list of wearable Christmas jumpers here.